121021242 has 16 divisors (see below), whose sum is σ = 242834592. Its totient is φ = 40208400.

The previous prime is 121021231. The next prime is 121021247. The reversal of 121021242 is 242120121.

It is a super-2 number, since 2×121021242² = 29292282030445128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121021247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31009 + ... + 34692.

It is an arithmetic number, because the mean of its divisors is an integer number (15177162).

Almost surely, 2^121021242 is an apocalyptic number.

121021242 is an abundant number, since it is smaller than the sum of its proper divisors (121813350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121021242 is a wasteful number, since it uses less digits than its factorization.

121021242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66013.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 121021242 is about 11000.9655030820. The cubic root of 121021242 is about 494.6376860995.

Adding to 121021242 its reverse (242120121), we get a palindrome (363141363).

The spelling of 121021242 in words is "one hundred twenty-one million, twenty-one thousand, two hundred forty-two".